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(No Model.) 2 Sheets-Sheet .2;

- J. P. MANTON. ENDLESS CHAIN ELEVATOR.

No. 504,044. Patented Aug. Z9, 1893.

Ntra rates ENDLESS-CHAIN ELEVATOR.

SPECIFICATION formingpart of Letters Patent I\To. 504,044, dated August 29,1893.

Serial No. 408.003. (No model.)

tion thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which forni a part of this specification.

My invention relates to that class of elevators called endless chain elevators, consisting of an arrangement of endless chains carrying a series of buckets, and generally used for the purpose of raising and delivering coal, sand, grain, or other com modity coming in similar shape, from one vessel to another, or to cars, or receptacles constructed for storing them.

My improvements refer mainly to the mode of applying power to raise or lower the elevator to accommodate it to the position of the vessel unloading, as affected by the rise and fall of the tide, and different levels of the coal, the., as the unloading goes on. It is fully illustrated in the accompanying drawings.

Figure 1, is a side elevation of an elevator of this description in connection with a barge in section, and a representation of the engine for operating and raising the elevator, and its connections therewith. Fig. 2, is a front view of the devices, and their arrangement, for taking up the slack of the wire ropes used for hoisting the elevator. Fig. 3, is a side wBriew, partly sectional, of the parts shown in -In Fig. l, is shown a part of the Wharf having a heavy frame-Work erected thereon to support the elevator proper, and the engine furnishing the power to run the chains with the buckets, and for raising or lowering the elevator, as may be required, to which latter purpose my improvements relate l The elevator belongs to the class called, endless chain elevators, and consists of heavy side plates c, having transverse shafts 19,5', at the bottom and top, respectively, and endless chains with a series of buckets e, e, attached thereto, passing over pulleys held on said shafts. The elevator is held between beams r, which support the engine that operates the chains of buckets through a heavy chain B, passing over the chain wheel lm, on shaft g, and wheels fast on shaft P, which receives motion from shaft V, of the engine.

The connecting arrangement between the engi-ne and the elevator proper, for raising and lowering the latter, consists of two wire ropes a, a, one end of each rope being attached to and wound around the drums A, A, on shaft S, and the other ends of the ropes carried out, one on each side, over pulleys j, j, secured to the beams r, and down each side of the elevator to the outer ends of an equalizing bar h, held in plates Z, to which they are securely fastened. When the drums A, A, are run back to let the elevator down, it is not always possible to stop them just when the elevator rests on its lower end, and as the drums turn a little farther, a slack in the wire ropes is made, which, as. it is sti, causes the coils on the'drums to become loose and get displaced. This trouble is obviated by a tightener or binder, consisting of a rectangular frame D, which is heldin an upright position, free to slide up and down between guides secured to two vertical stanchions J, J, extending up between two ocrs of the frame structure. The stauchions are placed one on each outer side of the two wire ropes a, a, so that the frame D, will come over those ropes, and two grooved pulleys o, o, held loosely on ashaft p, extending across the middle of the frame, rest on the wire ropes.v It will be plainly seen that when any slack is made in the ropes between the drums a, and

the pulleys j, j, the frame D, will slide down in of the frame. The pressure of the springs,l

keeps the pulleys 0, o, pressing against the ropes, so that they will coil closely on the drums.

Having thus described my i|nprovements,l claim as my invention- IOO The combination with astealm Windlasslmvthe rope and make it follow properly in Winding a drum to operate a Wire rope or chain to ing on the drum, substantially as herein set raise the elevator, of a, binder to take up the forth.

slack of said rope, said binder comprising a JOSEPH P. MANTON. slidablefrarne and one or more grooved pul- *Witnessesz leys movable freely on a cross shaft, and a JAMES G. ARNOLD,

Spring bearing against each pulley to guide BENJ. ARNOLD. 

